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Self-imaging effects in curved gradient index multimode interference structures made by K+–Na+ ion exchange

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Author(s): Marek Blahut | Dawid Froniewski

Journal: Optica Applicata
ISSN 0078-5466

Volume: 39;
Issue: 3;
Start page: 445;
Date: 2009;
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Keywords: multimode interference structures | ion-exchange

ABSTRACT
The paper presents an analysis of self-imaging phenomena in gradient multimode interference (MMI) structures produced by K+–Na+ ion exchange in glass. This investigation concerned curved MMI structures with various geometries – for the linear, concave function described by an exponential function, and the convex structure connected with a cosine course. The relations derived characterizing the relative shortening of the length of propagation for N-fold images have been confirmed by numerical simulations using the beam propagation method (BPM) of symmetrically excited gradient splitters 1×2.

Tango Jona
Tangokurs Rapperswil-Jona

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